the crucial testimony in the trial of the star montana quarterback. Jordan johnson was on the stand in his defense on monday. In this case that has divided the community, his fate is likely to rest on how he handles the next round of questions. Linsey davis is here with more Reporter: The defense called it the she said/she said case. Others are calling it trial by twirt. Bloggers are tweeting play-by-play updates about the quarterback who now faces up to 100 years in prison. For the first time, jurors are hearing firsthand what he has to say in his he said/she said case in montana. Jordan johnson, at the center of this alleged sexual assault case. I don't think I had intentions of a relationship. Reporter: Johnson's lawyers maintain the football player had consensual sex with a classmate. From the witness stand, a soft-spoken and demure johnson detailed the extent of their relationship. Including the text messages they exchanged. I honestly don't remember. How's it going? How is school going? Did you -- she came to my dormroom. And I went over to her dormroom. Reporter: Police say the night of the alleged incident, the woman invited johnson to her room to watch a movie. What happened next depends on who you believe. In this police interrogation tape played for jurors last week, johnson says the two began kissing on the woman's bed before things went further. If she had said stop or no, he says he would have stopped. But shortly after the incident, johnson's accuser texted a friend saying, I think I might have just gotten raped. I said no, but he wouldn't listen. She later told another friend, maybe I wanted it. Early in the day monday, the jury heard the accuser's brother, saying their sister struggled telling the family about the alleged ordeal. She started off really calm. And then, by the end, she started breaking down. Reporter: In those audio recordings played in court from the victim's family, her mother and brother talk about how she's changed. That she cries more and has become more guarded. The defense is trying to paint a picture of being jealous of another woman johnson had just started seeing. The trial resumes tomorrow.

This transcript has been automatically generated and may not be 100% accurate.

Jordan Johnson Testifies in Sexual Assault Trial

Dan Abrams discusses the trial of the former University of Montana quarterback.

Quarterback Jordan Johnson Sex Assault Trial Begins

The first witnesses were called in the trial of the former University of Montana football player.

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